The president said Trump’s comments about nuclear weapons show he “doesn’t know much” about proliferation.

14713-president-barack-obama-delivering-an-address-pvPresident Barack Obama on Friday questioned Donald Trump’s qualifications for the presidency, arguing that the businessman’s recent comments on foreign policy suggest he “doesn’t know much” about global politics.

Obama, who has intensified his criticism of Trump in recent weeks, laid into him at the Nuclear Security Summit in Washington, when asked about the GOP front-runner’s remarks in a March 26 interview with The New York Times. Trump proposed withdrawing U.S. troops from Japan and South Korea, where tens of thousands of Americans are stationed, and suggested those countries should manufacture their own nuclear weapons — a reversal from decades of bipartisan consensus on nuclear disarmament. Read more.